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Article ; Online: Clinicopathologic Spectrum of Renal Lesions Following Anti-TNF- α Inhibitor Therapy: A Single Center Experience.

Usui, Joichi / Salvatore, Steven P / Yamagata, Kunihiro / Seshan, Surya V

Kidney360

2023 Volume 4, Issue 3, Page(s) 363–373

MeSH term(s)	Tumor Necrosis Factor Inhibitors ; Infliximab/adverse effects ; Adalimumab/adverse effects
Chemical Substances	Tumor Necrosis Factor Inhibitors ; Infliximab (B72HH48FLU) ; Adalimumab (FYS6T7F842)
Language	English
Publishing date	2023-01-26
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	2641-7650
ISSN (online)	2641-7650
DOI	10.34067/KID.0000000000000063
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Article: [Kidney diseases and metabolic disorders--Basics and applications required for general physicians. Topics: IX. Impaired drug metabolism].

Usui, Joichi

Nihon Naika Gakkai zasshi. The Journal of the Japanese Society of Internal Medicine

2015 Volume 104, Issue 5, Page(s) 967–974

MeSH term(s)	Animals ; General Practitioners ; Humans ; Japan ; Kidney/drug effects ; Kidney/physiopathology ; Kidney Diseases/drug therapy ; Kidney Diseases/metabolism ; Metabolic Diseases/drug therapy ; Pharmaceutical Preparations
Chemical Substances	Pharmaceutical Preparations
Language	Japanese
Publishing date	2015-10-25
Publishing country	Japan
Document type	Journal Article ; Review
ZDB-ID	952816-7
ISSN	1883-2083 ; 0021-5384
ISSN (online)	1883-2083
ISSN	0021-5384
DOI	10.2169/naika.104.967
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Zs.B 594: Show issues

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Article ; Online: Adding Cases to the Study of Bucillamine-Associated Neural Epidermal Growth Factor-Like1-Positive Membranous Nephropathy.

Takahashi-Kobayashi, Mayumi / Usui, Joichi / Kawanishi, Kunio / Saito, Chie / Ebihara, Itaru / Yamagata, Kunihiro

Kidney international reports

2023 Volume 8, Issue 8, Page(s) 1698–1699

Language	English
Publishing date	2023-06-08
Publishing country	United States
Document type	Journal Article
ISSN	2468-0249
ISSN (online)	2468-0249
DOI	10.1016/j.ekir.2023.05.032
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Article: A Case of Castleman's Disease during the Long-Term Course of Membranous Nephropathy.

Nakajima, Shuhei / Nagai, Kei / Sakata, Akiko / Usui, Joichi / Yamagata, Kunihiro / Ueda, Atsushi

Case reports in nephrology

2023 Volume 2023, Page(s) 4926000

Abstract: Concomitant with nephrotic syndrome and multicentric castleman's disease (MCD) has only been described in a limited number of small studies and case reports. Among those, none confirmed the renal pathology prior to the onset of MCD, and none of the cases ...

Abstract	Concomitant with nephrotic syndrome and multicentric castleman's disease (MCD) has only been described in a limited number of small studies and case reports. Among those, none confirmed the renal pathology prior to the onset of MCD, and none of the cases had a history of nephrotic syndrome. A 76 year-old Japanese man visited a nephrologist because of incident nephrotic syndrome. He had previously experienced three episodes of nephrotic syndrome, the last one 13 years ago, and had been diagnosed with membranous nephropathy by renal biopsy. Apart from these previous episodes, he also suffered from systemic lymphadenopathy, anemia, elevated C-reactive protein, polyclonal hypergammopathy, and elevated interleukin (IL)-6. An inguinal lymph node biopsy revealed CD138-positive plasma cells in the interfollicular region. Based on these findings, MCD was diagnosed. Renal biopsy indicated primary membranous nephropathy with spike lesions and bubbling in the basement membranes and deposition of immunoglobulin (Ig) G, IgA, IgM, and phospholipase A2 receptor along the glomerular basement membrane. Corticosteroid monotherapy successfully reduced the edema, proteinuria, and IL-6, but hypoalbuminemia was not sufficiently improved due to castleman's disease and remission of the nephrotic syndrome was not achieved. Later, tocilizumab was administered for remission induction in another facility. To the best of our knowledge, this represents the first report of Castleman's disease with previously diagnosed membranous nephropathy. This case does not provide a causal mechanism for the pathophysiology, but it may be worth suggesting possible involvement of MCD as a trigger for recurrence of membranous nephropathy.
Language	English
Publishing date	2023-02-22
Publishing country	United States
Document type	Case Reports
ZDB-ID	2627652-5
ISSN	2090-665X ; 2090-6641
ISSN (online)	2090-665X
ISSN	2090-6641
DOI	10.1155/2023/4926000
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Article ; Online: In Silico

Takahashi-Kobayashi, Mayumi / Usui, Joichi / Kawanishi, Kunio / Yamagata, Kunihiro

Journal of the American Society of Nephrology : JASN

2022 Volume 33, Issue 12, Page(s) 2321–2322

MeSH term(s)	Humans ; Glomerulonephritis, Membranous ; Receptors, Phospholipase A2 ; Autoantigens
Chemical Substances	Receptors, Phospholipase A2 ; Autoantigens
Language	English
Publishing date	2022-09-29
Publishing country	United States
Document type	Letter ; Research Support, Non-U.S. Gov't ; Comment
ZDB-ID	1085942-1
ISSN	1533-3450 ; 1046-6673
ISSN (online)	1533-3450
ISSN	1046-6673
DOI	10.1681/ASN.2022070832
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Zs.A 3344: Show issues

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Article ; Online: Increased intrarenal post-glomerular blood flow is a key condition for the development of calcineurin inhibitor-induced renal tubular acidosis in kidney transplant recipients.

Kaneko, Shuzo / Usui, Joichi / Takahashi, Kazuhiro / Oda, Tatsuya / Yamagata, Kunihiro

Clinical transplantation

2022 Volume 36, Issue 6, Page(s) e14648

Abstract: Background: Hyperchloremic metabolic acidosis (HCMA) from renal tubular acidosis (RTA) is common in kidney transplant (KT) recipients. Calcineurin inhibitors (CNIs) are a potential cause of RTA, and whether HCMA is a determinant of poor graft prognosis ... ...

Abstract	Background: Hyperchloremic metabolic acidosis (HCMA) from renal tubular acidosis (RTA) is common in kidney transplant (KT) recipients. Calcineurin inhibitors (CNIs) are a potential cause of RTA, and whether HCMA is a determinant of poor graft prognosis is controversial. Methods: The subjects were living-donor KT recipients (LDKTRs, n = 47) and matched donors (n = 43). All cases of rejection, extrarenal causes, and respiratory disorders were excluded. HCMA was defined as having a [Na+]-[Cl Results: The HCMA incidence in the 3-m post-KT LDKTR group was higher than that of the donors (51.0% vs. 6.9%, p < 0.001, adjusted odds ratio: 6.7-15.7). Among adjusted factors, the most dominant HCMA contributor was low hemoglobin concentration (Hb ≤ 12 g/dl). Compared to non-HCMA cases, HCMA patients had low FF and low post-VR (p = 0.008, 0.003, respectively) suggesting increased intrarenal post-glomerular blood flow. The high pathological score of alternative arteriolar hyalinosis (aah) ≥2 was a significant HCMA risk. The tacrolimus trough level was not high in HCMA but was significantly high in HCMA in the low post-VR setting (p = 0.002). Conclusion: Among LDKTRs, low hemoglobin level is an important contributor to the manifestation of HCMA in the induction period, and increased intrarenal post-glomerular blood flow is a key condition for the development of CNI-induced RTA.
MeSH term(s)	Acidosis, Renal Tubular/epidemiology ; Acidosis, Renal Tubular/etiology ; Acidosis, Renal Tubular/metabolism ; Calcineurin Inhibitors/adverse effects ; Glomerular Filtration Rate ; Graft Rejection ; Hemoglobins ; Humans ; Immunosuppressive Agents ; Kidney Diseases/complications ; Kidney Transplantation/adverse effects ; Transplant Recipients
Chemical Substances	Calcineurin Inhibitors ; Hemoglobins ; Immunosuppressive Agents
Language	English
Publishing date	2022-03-20
Publishing country	Denmark
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	639001-8
ISSN	1399-0012 ; 0902-0063
ISSN (online)	1399-0012
ISSN	0902-0063
DOI	10.1111/ctr.14648
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Zs.A 2204: Show issues

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Article ; Online: Cardiorenal damages in mice at early phase after intervention induced by angiotensin II, nephrectomy, and salt intake.

Muromachi, Naoto / Ishida, Junji / Noguchi, Kazuyuki / Akiyama, Tomoki / Maruhashi, Syunsuke / Motomura, Kaori / Usui, Joichi / Yamagata, Kunihiro / Fukamizu, Akiyoshi

Experimental animals

2023 Volume 73, Issue 1, Page(s) 11–19

Abstract: The interconnection of heart performance and kidney function plays an important role for maintaining homeostasis through a variety of physiological crosstalk between these organs. It has been suggested that acute or chronic dysfunction in one organ ... ...

Abstract	The interconnection of heart performance and kidney function plays an important role for maintaining homeostasis through a variety of physiological crosstalk between these organs. It has been suggested that acute or chronic dysfunction in one organ causes dysregulation in another one, like patients with cardiorenal syndrome. Despite its growing recognition as global health issues, still little is known on pathophysiological evaluation between the two organs. Previously, we established a preclinical murine model with cardiac hypertrophy and fibrosis, and impaired kidney function with renal enlargement and increased urinary albumin levels induced by co-treatment with vasopressor angiotensin II (A), unilateral nephrectomy (N), and salt loading (S) (defined as ANS treatment) for 4 weeks. However, how both tissues, heart and kidney, are initially affected by ANS treatment during the progression of tissue damages remains to be determined. Here, at one week after ANS treatment, we found that cardiac function in ANS-treated mice (ANS mice) are sustained despite hypertrophy. On the other hand, kidney dysfunction is evident in ANS mice, associated with high blood pressure, enlarged glomeruli, increased levels of urinary albumin and urinary neutrophil gelatinase-associated lipocalin, and reduced creatinine clearance. Our results suggest that cardiorenal tissues become damaged at one week after ANS treatment and that ANS mice are useful as a model causing transition from early to late-stage damages of cardiorenal tissues.
MeSH term(s)	Humans ; Mice ; Animals ; Angiotensin II ; Sodium Chloride, Dietary/adverse effects ; Nephrectomy/adverse effects ; Kidney ; Cardio-Renal Syndrome/drug therapy ; Albumins
Chemical Substances	Angiotensin II (11128-99-7) ; Sodium Chloride, Dietary ; Albumins
Language	English
Publishing date	2023-07-18
Publishing country	Japan
Document type	Journal Article
ZDB-ID	2088228-2
ISSN	1881-7122 ; 1341-1357 ; 0007-5124
ISSN (online)	1881-7122
ISSN	1341-1357 ; 0007-5124
DOI	10.1538/expanim.23-0071
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Zs.B 1653: Show issues

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Article ; Online: Survey of Japanese nephrologists' use of clinical practice guidelines for rapidly progressive glomerulonephritis.

Takahashi-Kobayashi, Mayumi / Sada, Ken-Ei / Kawashima, Soko / Miyawaki, Yoshia / Nakazawa, Daigo / Furuichi, Kengo / Okada, Hirokazu / Narita, Ichiei / Usui, Joichi

Clinical and experimental nephrology

2023 Volume 28, Issue 4, Page(s) 316–324

Abstract: Background: The guidelines in Japan for the treatment of rapidly progressive glomerulonephritis (RPGN) have been revised; the latest update was released in 2020. We investigated the actual usage of the new guidelines in Japan.: Methods: We ... ...

Abstract	Background: The guidelines in Japan for the treatment of rapidly progressive glomerulonephritis (RPGN) have been revised; the latest update was released in 2020. We investigated the actual usage of the new guidelines in Japan. Methods: We distributed a survey electronically to board-certified nephrologists throughout Japan from December 15, 2021 to January 31, 2022. The survey focused on anti-neutrophil cytoplasmic antibody (ANCA)-associated RPGN and anti-glomerular basement membrane (GBM)-antibody RPGN, plus the treatment strategies and infection-prevention measures used. Results: The survey was completed by 155 certified nephrologists from medical facilities across Japan. Their responses regarding treatment procedures revealed that ANCA-associated RPGN was treated with immunosuppressants and/or biologics by 58.1% of the survey respondents, and with plasma exchange (PE) in combination with corticosteroids by 21.3%. Regarding anti-GBM-antibody RPGN, 78.1% of the respondents used corticosteroids in combination with PE (63.2%), cyclophosphamide (CY) (23.9%), or rituximab (RTX) (8.4%), suggesting a discrepancy between clinical practice and the actual use of the guidelines. Trimethoprim-sulfamethoxazole was prescribed as prophylaxis by 94.8% of the respondents, reflecting the widespread recognition of the need to prevent infectious disease in patients with RPGN. Conclusions: The survey responses revealed how Japan's new RPGN guidelines are used in actual clinical practice. Our findings will contribute to the guidelines' dissemination and implementation.
MeSH term(s)	Humans ; Adrenal Cortex Hormones ; Antibodies, Antineutrophil Cytoplasmic ; Glomerulonephritis/drug therapy ; Japan ; Nephritis ; Nephrologists ; Surveys and Questionnaires ; Practice Guidelines as Topic
Chemical Substances	Adrenal Cortex Hormones ; Antibodies, Antineutrophil Cytoplasmic
Language	English
Publishing date	2023-12-28
Publishing country	Japan
Document type	Journal Article
ZDB-ID	1338768-6
ISSN	1437-7799 ; 1342-1751
ISSN (online)	1437-7799
ISSN	1342-1751
DOI	10.1007/s10157-023-02441-y
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Article: [Epidemiology, prevention and treatment of drug-induced kidney injury].

Kaneko, Shuzo / Usui, Joichi / Yamagata, Kunihiro

Nihon Jinzo Gakkai shi

2019 Volume 58, Issue 7, Page(s) 1055–1058

MeSH term(s)	Acute Kidney Injury/chemically induced ; Acute Kidney Injury/epidemiology ; Acute Kidney Injury/prevention & control ; Acute Kidney Injury/therapy ; Humans ; Japan/epidemiology
Language	Japanese
Publishing date	2019-01-08
Publishing country	Japan
Document type	Journal Article
ZDB-ID	1195538-7
ISSN	0385-2385
ISSN	0385-2385
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Article ; Online: Renal Hemodynamic and Functional Changes in ADPKD Patients.

Ishii, Ryota / Kai, Hirayasu / Nakajima, Kentaro / Harada, Takuya / Akiyama, Tomoki / Okada, Eri / Tsunoda, Ryoya / Usui, Toshiaki / Mase, Kaori / Morito, Naoki / Saito, Chie / Usui, Joichi / Yamagata, Kunihiro

Kidney360

2024

Abstract: Background: Although the mechanisms underlying cyst enlargement in autosomal dominant polycystic kidney disease (ADPKD) are becoming clearer, those of renal dysfunction are not fully understood. In particular, total kidney volume (TKV) and renal ... ...

Abstract	Background: Although the mechanisms underlying cyst enlargement in autosomal dominant polycystic kidney disease (ADPKD) are becoming clearer, those of renal dysfunction are not fully understood. In particular, total kidney volume (TKV) and renal function do not always correspond. To elucidate this discrepancy, we studied in detail glomerular hemodynamic changes during ADPKD progression. Methods: Sixty-one ADPKD patients with baseline height-adjusted TKV (Ht-TKV) of 933±537 ml/m and serum creatinine of 1.16±0.62 mg/dl were followed for 2 years. Glomerular filtration rate (GFR) and renal plasma flow (RPF) slopes were calculated from inulin clearance (Cin) and para-aminohippuric acid (PAH) clearance (CPAH), respectively, while glomerular hydrostatic pressure (Pglo), afferent resistance (RA), and efferent resistance (RE) were estimated using the Gomez formulae. Each parameter was compared with baseline Ht-TKV. Patients were also subclassified into 1A-1B and 1C-1E groups according to the baseline Mayo imaging classification (MIC), and then compared with respect to GFR, RPF, FF and glomerular hemodynamics. Results: After 2 years, Ht-TKV increased (933±537 to 1000±648 ml/m, P<0.01), GFR decreased (66.7±30 to 57.3±30.1 ml/min/1.73m2, P<0.001), and RPF decreased (390±215 to 339±190 ml/min/1.73m2, P<0.05). Further, Pglo was decreased and RA was increased. Baseline Ht-TKV was inversely correlated with GFR (r=-0.29, P<0.05), but there was no association between baseline Ht-TKV and RPF, Pglo, RA, or RE annual changes. However, despite an increase in RE in 1A-1B group, RE was decreased in 1C-1E group. As a result, RE slope was significantly lower in 1C-1E group than 1A-1B group over time (-83(-309 to 102) to 164(-34 to 343) dyne・s・cm-5, P<0.01). Conclusions: This is the first report examining yearly changes of GFR (Inulin), RPF (PAH), and renal microcirculation parameters in ADPKD patients. Our results demonstrate that GFR reduction was caused by RA increase, which was faster due to RE decrease in subjects with faster Ht-TKV increase.
Language	English
Publishing date	2024-03-21
Publishing country	United States
Document type	Journal Article
ISSN	2641-7650
ISSN (online)	2641-7650
DOI	10.34067/KID.0000000000000412
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